[INFO] fetching crate tokio-macros 2.4.0...
[INFO] testing tokio-macros-2.4.0 against 1.83.0 for beta-1.84.0-4-retry
[INFO] extracting crate tokio-macros 2.4.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate tokio-macros 2.4.0 on toolchain 1.83.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.83.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tokio-macros 2.4.0
[INFO] finished tweaking crates.io crate tokio-macros 2.4.0
[INFO] tweaked toml for crates.io crate tokio-macros 2.4.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.83.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 40 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.83.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] affa9eb3d2840d4a5a1d1a3cc9650ef1551b2dd92bd14174d50d662d75ff02aa
[INFO] running `Command { std: "docker" "start" "-a" "affa9eb3d2840d4a5a1d1a3cc9650ef1551b2dd92bd14174d50d662d75ff02aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "affa9eb3d2840d4a5a1d1a3cc9650ef1551b2dd92bd14174d50d662d75ff02aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "affa9eb3d2840d4a5a1d1a3cc9650ef1551b2dd92bd14174d50d662d75ff02aa", kill_on_drop: false }`
[INFO] [stdout] affa9eb3d2840d4a5a1d1a3cc9650ef1551b2dd92bd14174d50d662d75ff02aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 36214ea09bd71c06e686684b5931eacdf0f1e8bd075c8e7b0e1abcb0cbb69078
[INFO] running `Command { std: "docker" "start" "-a" "36214ea09bd71c06e686684b5931eacdf0f1e8bd075c8e7b0e1abcb0cbb69078", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.92
[INFO] [stderr]    Compiling unicode-ident v1.0.14
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.90
[INFO] [stderr]    Compiling tokio-macros v2.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.57s
[INFO] running `Command { std: "docker" "inspect" "36214ea09bd71c06e686684b5931eacdf0f1e8bd075c8e7b0e1abcb0cbb69078", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36214ea09bd71c06e686684b5931eacdf0f1e8bd075c8e7b0e1abcb0cbb69078", kill_on_drop: false }`
[INFO] [stdout] 36214ea09bd71c06e686684b5931eacdf0f1e8bd075c8e7b0e1abcb0cbb69078
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b737333d67d0fd8d77cb3ca8c64d2e7062ee2a46de4594151d97d90829d79b31
[INFO] running `Command { std: "docker" "start" "-a" "b737333d67d0fd8d77cb3ca8c64d2e7062ee2a46de4594151d97d90829d79b31", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.168
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.15
[INFO] [stderr]    Compiling tokio-macros v2.4.0
[INFO] [stderr]    Compiling bytes v1.9.0
[INFO] [stderr]    Compiling tokio-macros v2.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling socket2 v0.5.8
[INFO] [stderr]    Compiling signal-hook-registry v1.4.2
[INFO] [stderr]    Compiling mio v1.0.3
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling tokio v1.42.0
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 14.17s
[INFO] running `Command { std: "docker" "inspect" "b737333d67d0fd8d77cb3ca8c64d2e7062ee2a46de4594151d97d90829d79b31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b737333d67d0fd8d77cb3ca8c64d2e7062ee2a46de4594151d97d90829d79b31", kill_on_drop: false }`
[INFO] [stdout] b737333d67d0fd8d77cb3ca8c64d2e7062ee2a46de4594151d97d90829d79b31
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 82069206981d571bd0e65b624a786ba99449dbd256a91dc75e84a23789fc8dd3
[INFO] running `Command { std: "docker" "start" "-a" "82069206981d571bd0e65b624a786ba99449dbd256a91dc75e84a23789fc8dd3", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tokio_macros-4508ae130d2c0544)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests tokio_macros
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 32 tests
[INFO] [stdout] test src/lib.rs - main (line 155) ... FAILED
[INFO] [stdout] test src/lib.rs - main (line 164) ... FAILED
[INFO] [stdout] test src/lib.rs - main (line 213) - compile ... FAILED
[INFO] [stdout] test src/lib.rs - main (line 227) - compile ... FAILED
[INFO] [stdout] test src/lib.rs - main (line 131) ... ok
[INFO] [stdout] test src/lib.rs - main (line 192) ... ok
[INFO] [stdout] test src/lib.rs - main (line 117) ... ok
[INFO] [stdout] test src/lib.rs - main (line 108) ... ok
[INFO] [stdout] test src/lib.rs - main (line 181) ... ok
[INFO] [stdout] test src/lib.rs - main (line 140) ... ok
[INFO] [stdout] test src/lib.rs - main (line 70) ... ok
[INFO] [stdout] test src/lib.rs - main_rt (line 268) ... ok
[INFO] [stdout] test src/lib.rs - main (line 54) ... ok
[INFO] [stdout] test src/lib.rs - test (line 335) - compile ... ok
[INFO] [stdout] test src/lib.rs - test (line 364) - compile ... ok
[INFO] [stdout] test src/lib.rs - test (line 373) - compile ... ok
[INFO] [stdout] test src/lib.rs - test (line 353) - compile ... ok
[INFO] [stdout] test src/lib.rs - test (line 397) - compile ... ok
[INFO] [stdout] test src/lib.rs - test (line 388) - compile ... ok
[INFO] [stdout] test src/lib.rs - test (line 421) - compile ... ok
[INFO] [stdout] test src/lib.rs - test (line 412) - compile ... ok
[INFO] [stdout] test src/lib.rs - test (line 437) - compile ... ok
[INFO] [stdout] test src/lib.rs - test (line 446) - compile ... ok
[INFO] [stdout] test src/lib.rs - test (line 480) - compile ... FAILED
[INFO] [stdout] test src/lib.rs - test (line 494) - compile ... FAILED
[INFO] [stdout] test src/lib.rs - test_rt (line 528) - compile ... ok
[INFO] [stdout] test src/lib.rs - test (line 464) ... ok
[INFO] [stdout] test src/lib.rs - main (line 92) ... ok
[INFO] [stdout] test src/lib.rs - main (line 83) ... ok
[INFO] [stdout] test src/lib.rs - main_rt (line 291) ... ok
[INFO] [stdout] test src/lib.rs - main_rt (line 277) ... ok
[INFO] [stdout] test src/lib.rs - main_rt (line 302) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - main (line 155) stdout ----
[INFO] [stdout] error[E0599]: no method named `start_paused` found for struct `tokio::runtime::Builder` in the current scope
[INFO] [stdout]  --> src/lib.rs:158:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     println!("Hello world");
[INFO] [stdout]   |     ^^^^^^^ private field, not a method
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - main (line 164) stdout ----
[INFO] [stdout] error[E0599]: no method named `start_paused` found for mutable reference `&mut tokio::runtime::Builder` in the current scope
[INFO] [stdout]  --> src/lib.rs:168:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | /     tokio::runtime::Builder::new_current_thread()
[INFO] [stdout] 5 | |         .enable_all()
[INFO] [stdout] 6 | |         .start_paused(true)
[INFO] [stdout]   | |         -^^^^^^^^^^^^ private field, not a method
[INFO] [stdout]   | |_________|
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - main (line 213) stdout ----
[INFO] [stdout] error: unexpected `cfg` condition name: `tokio_unstable`
[INFO] [stdout]  --> src/lib.rs:214:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[cfg(tokio_unstable)]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `clippy`, `debug_assertions`, `doc`, `docsrs`, `doctest`, `feature`, `fmt_debug`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `rustfmt`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, and `windows`
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tokio_unstable)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tokio_unstable)");` to the top of the `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:212:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![deny(warnings, rust_2018_idioms)]
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   = note: `#[deny(unexpected_cfgs)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] error: unexpected `cfg` condition name: `tokio_unstable`
[INFO] [stdout]   --> src/lib.rs:221:11
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[cfg(not(tokio_unstable))]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tokio_unstable)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tokio_unstable)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - main (line 227) stdout ----
[INFO] [stdout] error: unexpected `cfg` condition name: `tokio_unstable`
[INFO] [stdout]  --> src/lib.rs:228:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[cfg(tokio_unstable)]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `clippy`, `debug_assertions`, `doc`, `docsrs`, `doctest`, `feature`, `fmt_debug`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `rustfmt`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, and `windows`
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tokio_unstable)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tokio_unstable)");` to the top of the `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:226:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![deny(warnings, rust_2018_idioms)]
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   = note: `#[deny(unexpected_cfgs)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] error: unexpected `cfg` condition name: `tokio_unstable`
[INFO] [stdout]   --> src/lib.rs:241:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[cfg(not(tokio_unstable))]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tokio_unstable)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tokio_unstable)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - test (line 480) stdout ----
[INFO] [stdout] error: unexpected `cfg` condition name: `tokio_unstable`
[INFO] [stdout]  --> src/lib.rs:481:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[cfg(tokio_unstable)]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `clippy`, `debug_assertions`, `doc`, `docsrs`, `doctest`, `feature`, `fmt_debug`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `rustfmt`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, and `windows`
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tokio_unstable)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tokio_unstable)");` to the top of the `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:479:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![deny(warnings, rust_2018_idioms)]
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   = note: `#[deny(unexpected_cfgs)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] error: unexpected `cfg` condition name: `tokio_unstable`
[INFO] [stdout]   --> src/lib.rs:488:11
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[cfg(not(tokio_unstable))]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tokio_unstable)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tokio_unstable)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - test (line 494) stdout ----
[INFO] [stdout] error: unexpected `cfg` condition name: `tokio_unstable`
[INFO] [stdout]  --> src/lib.rs:495:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[cfg(tokio_unstable)]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `clippy`, `debug_assertions`, `doc`, `docsrs`, `doctest`, `feature`, `fmt_debug`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `rustfmt`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, and `windows`
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tokio_unstable)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tokio_unstable)");` to the top of the `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:493:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![deny(warnings, rust_2018_idioms)]
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   = note: `#[deny(unexpected_cfgs)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] error: unexpected `cfg` condition name: `tokio_unstable`
[INFO] [stdout]   --> src/lib.rs:509:11
[INFO] [stdout]    |
[INFO] [stdout] 17 | #[cfg(not(tokio_unstable))]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tokio_unstable)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tokio_unstable)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - main (line 155)
[INFO] [stdout]     src/lib.rs - main (line 164)
[INFO] [stdout]     src/lib.rs - main (line 213)
[INFO] [stdout]     src/lib.rs - main (line 227)
[INFO] [stdout]     src/lib.rs - test (line 480)
[INFO] [stdout]     src/lib.rs - test (line 494)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 26 passed; 6 failed; 0 ignored; 0 measured; 0 filtered out; finished in 7.89s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "82069206981d571bd0e65b624a786ba99449dbd256a91dc75e84a23789fc8dd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82069206981d571bd0e65b624a786ba99449dbd256a91dc75e84a23789fc8dd3", kill_on_drop: false }`
[INFO] [stdout] 82069206981d571bd0e65b624a786ba99449dbd256a91dc75e84a23789fc8dd3
